temperamental

Meanings

• relating to or caused by temperament;
• "temperamental indifference to neatness"
• "temperamental peculiarities"
• subject to sharply varying moods;
• "a temperamental opera singer"
• likely to perform unpredictably; - Osbert Lancaster
• "a temperamental motor
• "that beautiful but temperamental instrument the flute"

Synonyms

• moody
• erratic

temperamental is not valid in Words With Friends